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brain tumor spectroscopy

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https://www.readbyqxmd.com/read/29924642/increased-cytokines-at-high-altitude-lack-of-effect-of-ibuprofen-on-acute-mountain-sickness-physiological-variables-or-cytokine-levels
#1
Jenny Lundeberg, John R Feiner, Andrew Schober, Jeffrey W Sall, Helge Eilers, Philip E Bickler
Lundeberg, Jenny, John R. Feiner, Andrew Schober, Jeffrey W. Sall, Helge Eilers, and Philip E. Bickler. Increased cytokines at high altitude: lack of effect of ibuprofen on acute mountain sickness, physiological variables or cytokine levels. High Alt Med Biol. 00:000-000, 2018. INTRODUCTION: There is no consensus on the role of inflammation in high-altitude acclimatization. AIMS: To determine the effects of a nonsteroidal anti-inflammatory drug (ibuprofen 400 mg every 8 hours) on blood cytokines, acclimatization, acute mountain sickness (AMS, Lake Louise Score), and noninvasive oxygenation in brain and muscle in healthy volunteers...
June 20, 2018: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/29911072/inhibiting-glycine-decarboxylase-suppresses-pyruvate-to-lactate-metabolism-in-lung-cancer-cells
#2
Chern Chiuh Woo, Kavita Kaur, Wei Xin Chan, Xing Qi Teo, Teck Hock Philip Lee
Glycine decarboxylase (GLDC) gene is frequently upregulated in various types of cancer including lung, prostate and brain. It catabolizes glycine to yield 5,10-methylenetetrahydrofolate, an important substrate in one-carbon metabolism for nucleotide synthesis. In this study, we used exon splicing modulating steric hindrance antisense oligonucleotide (shAON) to suppress GLDC expression and investigated its effect on pyruvate metabolism via hyperpolarized carbon-13 magnetic resonance spectroscopy (MRS). The MRS technique allows us to study in vivo metabolic flux in tumor tissues with/without GLDC-shAON intervention...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29902200/acrin-6684-multicenter-phase-ii-assessment-of-tumor-hypoxia-in-newly-diagnosed-glioblastoma-using-magnetic-resonance-spectroscopy
#3
Eva-Maria Ratai, Zheng Zhang, James Fink, Mark Muzi, Lucy Hanna, Erin Greco, Todd Richards, Daniel Kim, Ovidiu C Andronesi, Akiva Mintz, Lale Kostakoglu, Melissa Prah, Benjamin Ellingson, Kathleen Schmainda, Gregory Sorensen, Daniel Barboriak, David Mankoff, Elizabeth R Gerstner
A multi-center imaging trial by the American College of Radiology Imaging Network (ACRIN) "A Multicenter, phase II assessment of tumor hypoxia in glioblastoma using 18F Fluoromisonidazole (FMISO) with PET and MRI (ACRIN 6684)", was conducted to assess hypoxia in patients with glioblastoma (GBM). The aims of this study were to support the role of proton magnetic resonance spectroscopic imaging (1H MRSI) as a prognostic marker for brain tumor patients in multi-center clinical trials. Seventeen participants from four sites had analyzable 3D MRSI datasets acquired on Philips, GE or Siemens scanners at either 1...
2018: PloS One
https://www.readbyqxmd.com/read/29893995/on-the-relation-between-mr-spectroscopy-features-and-the-distance-to-mri-visible-solid-tumor-in-gbm-patients
#4
Nuno Pedrosa de Barros, Raphael Meier, Martin Pletscher, Samuel Stettler, Urspeter Knecht, Evelyn Herrmann, Philippe Schucht, Mauricio Reyes, Jan Gralla, Roland Wiest, Johannes Slotboom
PURPOSE: To improve the detection of peritumoral changes in GBM patients by exploring the relation between MRSI information and the distance to the solid tumor volume (STV) defined using structural MRI (sMRI). METHODS: Twenty-three MRSI studies (PRESS, TE 135 ms) acquired from different patients with untreated GBM were used in this study. For each MRSI examination, the STV was identified by segmenting the corresponding sMRI images using BraTumIA, an automatic segmentation method...
June 12, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29795083/-intraoperative-fluorescence-diagnostics-in-surgery-of-intracranial-meningiomas-analysis-of-101-cases
#5
A A Potapov, S A Goryaynov, G V Danilov, D M Chelushkin, V A Okhlopkov, V N Shimanskiy, Sh T Beshplav, V K Poshataev, L V Shishkina, N E Zakharova, A Spallone, T A Savel'eva, V B Loshchenov
Fluorescence diagnostics has been extensively applied in surgery of malignant brain gliomas. However, the use of this technique in surgery of intracranial meningiomas has remained controversial. OBJECTIVE: The study objective was to assess the sensitivity of 5-aminolevulinic acid-based (5-ALA) fluorescence diagnostics in surgery of brain meningiomas and to clarify the clinical and biological factors that may influence the fluorescent effect. MATERIAL AND METHODS: The study consistently included 101 patients with intracranial meningiomas of various locations who were operated on using 5-ALA...
2018: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/29787247/enhanced-photogeneration-of-reactive-oxygen-species-and-targeted-photothermal-therapy-of-c6-glioma-brain-cancer-cells-by-folate-conjugated-gold-photoactive-polymer-nanoparticles
#6
Jaber Keyvan Rad, Ali Reza Mahdavian, Samideh Khoei, Sakine Shirvalilou
Tumor-selective photodynamic therapy is a successful method for ablation of malignant and cancerous cells. Herein, we introduce the design and preparation of functionalized acrylic copolymer nanoparticles with spiropyran (SP) and imidazole groups through a facile semi-continuous emulsion polymerization. Then, Au3+ ions were immobilized and reduced on their surface to obtain photoresponsive gold-decorated polymer nanoparticles (PGPNPs). The prepared PGPNPs were surface-modified with folic acid as a site-specific tumor cell targeting agent and improve intracellular uptake via endocytosis...
May 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29760966/fast-localization-method-of-an-anomaly-in-tissue-based-on-differential-optical-density
#7
Huiquan Wang, Lina Ren, Zhe Zhao, Jinhai Wang, Hongli Chen
The position of the source-detector (S-D) relative to an anomaly has an important influence on the detection effect in non-invasive near-infrared spectroscopy-based methods. In this study, a single-source multi-detector structure was designed in order to realize the rapid localization of anomalies within tissue. This method uses finite element analysis of the optical density distribution for different horizontal positions, depths and diameters of anomalies. The difference in optical density between the detectors was then calculated...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29734497/pseudoprogression-of-brain-tumors
#8
Stefanie C Thust, Martin J van den Bent, Marion Smits
This review describes the definition, incidence, clinical implications, and magnetic resonance imaging (MRI) findings of pseudoprogression of brain tumors, in particular, but not limited to, high-grade glioma. Pseudoprogression is an important clinical problem after brain tumor treatment, interfering not only with day-to-day patient care but also the execution and interpretation of clinical trials. Radiologically, pseudoprogression is defined as a new or enlarging area(s) of contrast agent enhancement, in the absence of true tumor growth, which subsides or stabilizes without a change in therapy...
May 7, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29719137/real-time-imaging-of-brain-tumor-for-image-guided-surgery
#9
REVIEW
Shuang Hu, Homan Kang, Yoonji Baek, Georges El Fakhri, Anren Kuang, Hak Soo Choi
The completion of surgical resection is a key prognostic factor in brain tumor treatment. This requires surgeons to identify residual tumors in theater as well as to margin the proximity of the tumor to adjacent normal tissue. Subjective assessments, such as texture palpation or visual tissue differences, are commonly used by oncology surgeons during resection to differentiate cancer lesions from normal tissue, which can potentially result in either an incomplete tumor resection, or accidental removal of normal tissue...
May 2, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29697883/variation-of-t-2-relaxation-times-in-pediatric-brain-tumors-and-their-effect-on-metabolite-quantification
#10
Dominic Carlin, Ben Babourina-Brooks, Nigel P Davies, Martin Wilson, Andrew C Peet
BACKGROUND: Metabolite concentrations are fundamental biomarkers of disease and prognosis. Magnetic resonance spectroscopy (MRS) is a noninvasive method for measuring metabolite concentrations; however, quantitation is affected by T2 relaxation. PURPOSE: To estimate T2 relaxation times in pediatric brain tumors and assess how variation in T2 relaxation affects metabolite quantification. STUDY TYPE: Retrospective. POPULATION: Twenty-seven pediatric brain tumor patients (n = 17 pilocytic astrocytoma and n = 10 medulloblastoma) and 24 age-matched normal controls...
April 26, 2018: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29693348/contrast-enhanced-perfusion-mr-imaging-to-differentiate-between-recurrent-residual-brain-neoplasms-and-radiation-necrosis
#11
Noha Ahmed Kamal Metaweh, Amr Osama Azab, Ayman Abd El Hameed El Basmy, Karim Nabil Mashhour, Wael Mokhtar El Mahdy
Purpose: To determine the value of dynamic susceptibility contrast enhanced (DSC) MRI (magnetic resonance imaging) perfusion in the characterization of newly developed/enlarging lesions within irradiated regions after treatment of brain tumors. Methods: This prospective cross-sectional study covered 23 patients, 12 females and 11 males. All cases initially presented with histologically proven malignant brain tumors and underwent surgical intervention followed by radiotherapy (+/- chemotherapy). On follow up imaging, they presented with newly developed/progressively enhancing mass lesions at the sites of the primary tumors...
April 25, 2018: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/29692921/evaluation-of-the-added-value-of-1-h-magnetic-resonance-spectroscopy-for-the-diagnosis-of-pediatric-brain-lesions-in-clinical-practice
#12
Karen Manias, Simrandip K Gill, Niloufar Zarinabad, Paul Davies, Martin English, Daniel Ford, Lesley MacPherson, Ina Nicklaus-Wollenteit, Adam Oates, Guirish Solanki, Jenny Adamski, Martin Wilson, Andrew C Peet
Background: Magnetic resonance spectroscopy (MRS) aids noninvasive diagnosis of pediatric brain tumors, but use in clinical practice is not well documented. We aimed to review clinical use of MRS, establish added value in noninvasive diagnosis, and investigate potential impact on patient care. Methods: Sixty-nine children with lesions imaged using MRS and reviewed by the tumor board from 2014 to 2016 met inclusion criteria. Contemporaneous MRI diagnosis, spectroscopy analysis, histopathology, and clinical information were reviewed...
March 2018: Neuro-oncology Practice
https://www.readbyqxmd.com/read/29680253/longitudinal-study-of-irradiation-induced-brain-microstructural-alterations-with-s-index-a-diffusion-mri-biomarker-and-mr-spectroscopy
#13
Elodie Anne Pérès, Olivier Etienne, Antoine Grigis, Fawzi Boumezbeur, François Dominique Boussin, Denis Le Bihan
PURPOSE: Radiation therapy is widely used for the treatment of brain tumors, but it may lead to severe cognitive impairments. Previous studies have shown that ionizing irradiation induces demyelination, blood-brain barrier alterations, and impaired neurogenesis in animal models. Hence, noninvasive and sensitive biomarkers of irradiation injury are needed to investigate these effects in patients and improve radiation therapy protocols. METHODS AND MATERIALS: The heads of 3-month-old male C57BL/6RJ mice (15 control mice and 15 irradiated mice) were exposed to radiation doses of 3 fractions of 5 Gy from a 60 Co source with a medical irradiator...
February 2, 2018: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29656881/fundamentals-of-functional-imaging-i-current-clinical-techniques
#14
A Luna, T Martín Noguerol, L Alcalá Mata
Imaging techniques can establish a structural, physiological, and molecular phenotype for cancer, which helps enable accurate diagnosis and personalized treatment. In recent years, various imaging techniques that make it possible to study the functional characteristics of tumors quantitatively and reproducibly have been introduced and have become established in routine clinical practice. Perfusion studies enable us to estimate the microcirculation as well as tumor angiogenesis and permeability using ultrafast dynamic acquisitions with ultrasound, computed tomography, or magnetic resonance (MR) imaging...
May 2018: Radiología
https://www.readbyqxmd.com/read/29620771/an-early-investigative-serum-raman-spectroscopy-study-of-meningioma
#15
Kanika Mehta, Apurva Atak, Aditi Sahu, Sanjeeva Srivastava, Murali Krishna C
Meningiomas represent one of the most frequently reported non-glial, primary brain and central nervous system (CNS) tumors. Meningiomas often display a spectrum of anomalous locations and morphological attributes, deterring their timely diagnosis. Majority of them are sporadic in nature and thus the present-day screening strategies, including radiological investigations, often result in misdiagnosis due to their aberrant and equivocal radiological facets. Therefore, it is pertinent to explore less invasive and patient-friendly biofluids such as serum for their screening and diagnostics...
April 16, 2018: Analyst
https://www.readbyqxmd.com/read/29588064/the-evaluation-of-the-effects-of-steroid-treatment-on-the-tumor-and-peritumoral-edema-by-dwi-and-mr-spectroscopy-in-brain-tumors
#16
Cahit Kural, Gokce Kaan Atac, Ozkan Tehli, Ilker Solmaz, Caglar Temiz, Irgen Hodaj, Yusuf Izci
OBJECTIVE: To investigate the effects of dexamethasone on brain tumor and peritumoral edema by different sequences of magnetic resonance imaging (MRI). MATERIALS AND METHODS: MRI was performed in 28 patients with brain tumor. Patients were divided into the 3 groups based on the histological diagnosis; Group I: high-grade glial tumor, Group II: low-grade glial tumor, and Group III: brain metastasis. The measurements of peritumoral edema volume and apparent diffusion coefficient (ADC) values were performed while the peak areas of cerebral metabolites were measured by spectroscopy in groups I and II...
March 13, 2018: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/29574625/the-cluster-re-6-se-8-i-6-3-penetrates-biological-membranes-drug-like-properties-for-cns-tumor-treatment-and-diagnosis
#17
Lisbell D Estrada, Elizabeth Duran, Matias Cisterna, Cesar Echeverria, Zhiping Zheng, Vincenzo Borgna, Nicolas Arancibia-Miranda, Rodrigo Ramírez-Tagle
Tumorigenic cell lines are more susceptible to [Re6 Se8 I6 ]3- cluster-induced death than normal cells, becoming a novel candidate for cancer treatment. Still, the feasibility of using this type of molecules in human patients remains unclear and further pharmacokinetics analysis is needed. Using coupled plasma optical emission spectroscopy, we determined the Re-cluster tissue content in injected mice, as a biodistribution measurement. Our results show that the Re-cluster successfully reaches different tissues, accumulating mainly in heart and liver...
March 24, 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/29548050/radiomics-metabolic-and-molecular-mri-for-brain-tumors
#18
Philipp Kickingereder, Ovidiu Cristian Andronesi
Magnetic resonance imaging plays a key role in diagnosis and treatment monitoring of brain tumors. Novel imaging techniques that specifically interrogate aspects of underlying tumor biology and biochemical pathways have great potential in neuro-oncology. This review focuses on the emerging role of 2-hydroxyglutarate-targeted magnetic resonance spectroscopy, as well as radiomics and radiogenomics in establishing diagnosis for isocitrate dehydrogenase mutant gliomas, and for monitoring treatment response and predicting prognosis of this group of brain tumor patients...
February 2018: Seminars in Neurology
https://www.readbyqxmd.com/read/29487664/progression-of-tumefactive-demyelinating-lesion-in-a-child-demonstrated-with-mri
#19
Marta De Simone, Barbara Brogna, Daniele Litterio Spitaleri, Giulio Cicarelli, Roberta Fantozzi, Bruno Guida
Tumefactive demyelinating lesions (TDLs) are atypical presentations of various demyelinating diseases. They can mimic brain tumors in their clinical and radiological features and usually respond favorably to corticosteroid therapy. We report a case of a 17-year-old girl with a single TDL suddenly increasing in size even under steroid therapy. She underwent very strict follow-up examinations with conventional magnetic resonance and diffusion-weighted imaging, perfusion-weighted imaging, proton-magnetic resonance spectroscopy...
February 2018: Radiology Case Reports
https://www.readbyqxmd.com/read/29469659/grading-of-oligodendroglial-tumors-of-the-brain-with-apparent-diffusion-coefficient-magnetic-resonance-spectroscopy-and-dynamic-susceptibility-contrast-imaging
#20
Muhammad Atif Naveed, Pradeep Goyal, Ajay Malhotra, Xiang Liu, Sonali Gupta, Manisha Mangla, Rajiv Mangla
Purpose We explored whether advanced magnetic resonance (MR) imaging techniques could grade oligodendrogliomas. Methods Forty patients (age 9-61 years) with oligodendroglial tumors were selected. There were 23 patients with World Health Organization grade II (group 1) and 17 patients with grade III (group 2) tumors. Apparent diffusion coefficient (ADC) maps were calculated by b values of 0 and 1000 s/mm2 . Dynamic susceptibility contrast (DSC) images were obtained during the first pass of a bolus of gadolinium-based contrast...
January 1, 2018: Neuroradiology Journal
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